Extension device



' June24, 1930. v Pfw. JONES 1,757,530

EXTENS ION DEVICE Filed Feb. 6, 1929 mmmmm( v-,muhnllllllullllllllllllllllllmml'g 4- IN V EN TOR.

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Patented June 24,1930 I r i i UNITED STATES Parent "FFICE PERCIVAL w.JONES, F WARWICK, RHODE ISLAND, ASSIGNOE TO ROSENHEIM co. Ind;

OF PROVIDENCE, RHODE IFSLA'ND', A COBPORATIQN OF RHODE ISLAND EXTENSIONnnvicn Application fil ed February aTiaaa Serial No. 337 ,837.

This invention relates to an extensionjde section with the clampassembled therewith. vice of the type interposed in a wrist watch It isfound in the use of wrist watch bracestrap; and has -for its object toprovide an lets desirable to provide an extension device improved meansfor retaining the sections. which may be unfolded to temporarily infolded position. lengthen the wrist-encircling size of the A furtherobject of the invention is the strap to permit it to be passed over theconstructing of the sections so that they hand of the wearer and toprovide such a may nest one within the other and be of constructionwhich may have the desired minimum thickness when the deviceis inunfolding action and yet be firnilysecured folded position. l a 1nfolded position against usualunfolding A still further object of theinvention is strains and to" accomplish these results I the provision ofan easily releasable clamp have provided a pairof inturned end finforsecuring one of the straps to its section. gers spaced from the top wallofthe cover With these and other objects in view, the section and have"so shaped. the nd d e 1 inventionconsists of certain novel features ofthe body section as to snap between these of construction, as will bemore fully defi ngers, and the top wall of the cover sec scribed, andparticularly pointed out in the tlon to lock the parts in closedposition, d d l i J and in order that the sections may lie close In theaccompanying drawings: one to the other, I'have provided alpair of 20Fig. 1 isa top plan view of the extension links to fit betweentheopposite walls; ofa

device in folded'position, H palr of sections so thatthey will notover-Fig. 2 is a top view of the extensiondehe one another to increase thethickness of V vice in extended positionshowing the dif the device. Ihave also provided a novel ferent sections as hinged together. v meansfor Securing and adjusting of the 25 Fig. 8 is a sectional side View ofthe device rap to one of the sections, consisting of unfolded, asillustratedin Fig. 2. providing a clamping g 1 h i n Fig. 4 is asectional view showing the deitself with a p votally mounted shoe to reipa ti ll f ld d, ceive between it and the clamp edge the Fig. 5 is 'asectional view showing the'derap'to be attached thereto; and the fol- 30vice as completely folded in clasped position. lowing 1s a detaileddescription of thepres- Fig. 6 is a sectional end view of the device entembodiment of this invention illustratin folded position taken on line66 of mg P rred means by which these ad Fi 5 V vantages results may beaccomplished:

Fig. 7 is aperspective view of the end of 71th reference to thedrawings, 12 desig- 35 the coversectionshowing one portion of the Hatesthe body section which' is of channel V Clamp I shape in cross section,having an outer wall Fig. 8 is a perspective view of the clamp 13 ndopposlteside walls 14:: "Atone end which is associated with the portionshown of this body section there-is pivoted at v in Fig? V r g 15 aplate sect1on16, which is hinged at 40 Fig. 9 is a perspective viewshowing the 17 to' a second plate section 18, both of parts of Figs? and8 in assembled P08111011. which maybe folded one upon the other i Fig.10 is a sectional view tliroughthe to house n the channel section 12,asis ilpivoting trunnionsof Fig. 9. lustlflted 111 g; 1- Fig. 11 is asectional view of the assembly The P a $901510]? 18 13 0t l n e r f Fi 9V 7 than the body section 14 and on that'po'rtion Fig. 12 is afragmental perspective view 19 thereof which extends beyond the end of amodification of the end section. of the body sect on 12 when'in foldedposi Fig. 13 is a perspective view of the clamp t1on,I have provideda'pair of spaced flanges associated therewith- 196131116611 W there IS PQCl a gripper Fig. 14 is a section of the modified end 21 havinga camlngedge 22 to bind between this edge and the plate 18, one end 23 of asuitable strap 24, as illustrated in Fig. 1.

The cover section 25 is of channel shape in cross section having anouter wall 26 and side walls 27, and is connected to the body section byan intermediate section formed of a pair of links 28 pivoted as at 29and 30 tothe respective side walls 14 and 27 of these two sections so asto swing thereover and cover the plate sect-ions 16 and 18 when foldedtherein.

This cover section 25 is of a width greater than the body section sothat its channel walls 27 will not only receive between them to liebetween the side walls of the sections so that all of the parts nest onewithin the other and the links 28 will not overlie the plate sections 16and 18 to increase the thickness of the device when in folded position,but rather will merely tend to increase the general width of the-deviceby a dimension equal to the thickness of the sheet stock from which theyare formed.

The cover section is extended at its free end 31 with a downwardlyturned jaw 32, and on the sides of this extension trunnions 33 areprovided to pivotally mount a shoe 34 having a strap engaging surface35with flanges 36 to receive in openings 37 the trunnions 33. When theshoe is in the position illustrated in Figs. 3,4 and 9, the strap end 40will be held between the jaw 32 and the strap engaging surface 35 toreleasably secure this end of the strap to the device. I

For some constructions, however, I prefer to reduce the end portion ofthe end section, as illustrated at 41 in Fig. 12, to conform to theappearance of one of the links of the strap which is flanged at 42 withopenings 43 therein to receive the trunnions 44; of the gripper 45 whichoperates in the same manner as the gripper 21 on the opposite endsection. r

In order that the sections may be retained in folded position, I haveprovided a pair of fingers 38 on the end edges of the side walls 27 ofthe cover section, which extend toward each other. These fingers 38 arepositioned at a point spaced from the top or outer wall of this sectionand receive in this space the rounded ends 39 of the edges of the sidewalls 14: to firmly clamp the two channel sections together.

It will be understood that there is sufficient resiliency in theinturned fingers thus formed to permit of snapping and unsnapping of thesections to and from folded position for the desired purposeshereinbefore mentioned.

The foregoing description is directed solely towards the constructionillustrated, but I desire it to beunderstood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible, the invention being defined and limited only by theterms of the appended claims.

I claim:

1. In an extension device, a plurality of sections, means for connectingsaid sections together to permit folding one on the other, one sectionhaving an outer wall and spaced side portions, said spaced side portionshaving fingers extending therefrom toward each other and spaced from theouter wall and another of said sections having portions at its free endto snap between said fingers and said outer wall due to resiliency ofsaid fingers in a direction longitudinally of the device. 7

2. In an extension device, a channel shaped body having an outer walland side walls,- a cover section channel shaped in cross section'andhaving an outer wall and side walls, an intermediate section hingedlyattached to said sections to permit foldingof the channel sections oneon the other, fingers extending toward each other from the free endedges of the opposite side walls of one of said channel sections andspaced from its outer wall, the free end edges of said other channelsection having rounded nose portionsto snap between said fingersand'said outerwall by resiliency of said fingers in a directionlongitudinally of the device and hold said sectionscin folded position.f

3. In an extension device, a channelshaped body section having an outerwall and side walls, a cover section channelshaped in cross sectionhaving an outer wall and side walls, a pair of links hingedly connectingsaid sections to, permit folding of the sections one on the other,fingers extending toward each other from the free end edges of theopposite side walls of one of said channel sections and spaced from saidouter wall, the free end edges of the other channel section havingrounded nose por-- tions to resiliently snap between said fingers andsaid outer wall by resiliency of said fingers in a directionlongitudinally of the device and hold said sections in folded position.

4. In an extension device, a plurality of sections, means for connectingsaid sections together to permit folding one on the other, one endsection having means for attaching a strap thereto, comprising adownwardly-turned lip on the edge of said section,

and a member pivoted on the section to swing towards and from said lipto press the strap into direct clamping engagement with the edge of saidlip. V

5. In an extension device, a plurality of sections, means for connectingsaid sections together to permit folding one on the other,

one end section extending beyond another section when in folded positionand having a lip extending at an angle thereto, and a member on thesection pivoted to swing towards and from said lip to press the strapinto direct clamping engagement with the edge of said lip.

6. In an extension device, a plurality of sections, means for connectingsaid sections together to permit folding one on the other, one endsection extending beyond the other section when in folded position andhaving a lip extending at an angle thereto, trunnions extending fromboth sides of said extension, a plate having side ears with openingstherein adjacent the end edge of the plate to receive said trunnions andpivotally mount the same to swing and receive between it and the lip astrap to be attached thereto, to press the strap intodirect clampingengagement with the edge of the lip.

Intestimony whereof I aflix my signature.

PERCIVAL W. JONES.

